A new critical patch, MS15-078 / KB 3079904, replaces a similar patch, MS15-077 / KB 3077657, that was released last week. They tackle a hole in the Adobe Type Manager font manager that can be exploited when you just look at a Web page or open a document with a compromised embedded OpenType font. Once the remote code execution hole is breached, "An attacker could then install programs; view, change, or delete data; or create new accounts with full user rights."